Hi and thanks for your comment on my blog! If you're wanting to host the larger size photos on your blog, you'll have to upload using Flickr or Photobucket instead of blogger's photo upload system. Once you've uploaded your photo to a hosting site, you can embed the link to the larger size photo in your post. The only thing is, you'll need to have a blog width that can accommodate a wider photo, and it looks like you may not have the room. You might want to hire a blog designer to give you a wider template so you will have room for bigger images!